What are the characteristics of Lanzhou's climate?

Features: Lanzhou has a temperate continental climate. The annual average temperature is 65438 00.3℃. There is no heat in summer and no cold in winter. This is a famous summer resort. The annual average sunshine hours are 2446 hours, the frost-free period is 180 days, and the annual average precipitation is 327mm, mainly from June to September. Gansu is located in the deep inland of northwest China, where warm and humid air currents are difficult to reach and there are few opportunities for rainfall. The climate in most areas is dry and belongs to temperate monsoon climate, which is continental. Winter is cold and long, the boundary between spring and summer is unclear, summer is short, the temperature is high, and the temperature drops quickly in autumn. The annual average temperature in the whole province is between 0 ~ 16℃, with different altitudes, large temperature difference, abundant sunshine and large daily temperature difference. The annual precipitation in all parts of the province is 36.6 ~ 734.9 mm, decreasing from southeast to northwest. The precipitation in the west of Wushaoling is obviously reduced, and the precipitation in Longnan Mountain area and the east of Qilian Mountain is more. Affected by the monsoon, precipitation is mostly concentrated in June-August, accounting for 50%-70% of the annual precipitation. The frost-free period in the province varies greatly from place to place. Longnan Valley is generally about 280 days, and Gannan Plateau is the shortest, only 140 days. The altitude in most places is between 1500m and 3000m, and the annual rainfall is about 300mm (40-800mm). The climate varies greatly from place to place, and the ecological environment is complex and diverse.

Introduction:

Lanzhou, referred to as "Lan" for short, is the capital of Gansu Province, an important industrial base and comprehensive transportation hub in the northwest of China, one of the important central cities in the western region, an important fulcrum of the West Longhai-Lanzhou New Economic Belt, an important transportation hub and logistics center in the northwest, one of the five central cities in the China section of the New Eurasian Continental Bridge, the second largest city in the northwest, a bridge and link between East China and Central China, a transportation and communication hub, a research and education center in the northwest, and the Silk Road.

Lanzhou is an important town on the ancient Silk Road. As early as 5000 years ago, human beings thrived here. The county government was established in the Western Han Dynasty, which means "Jincheng Tang Chi" and is called Jincheng. At the beginning of Sui Dynasty, it was renamed Lanzhou. From the Han Dynasty to the Tang and Song Dynasties, with the opening of the Silk Road, there was a grand occasion in which silk went west and Tianma came east. Lanzhou has gradually become an important traffic artery and commercial port of the Silk Road, an important metropolis and link connecting ethnic minorities in the west, and has played an important role in communicating and promoting economic and cultural exchanges between China and the West.

20 12 On August 28th, the State Council approved the establishment of Lanzhou New District, which is the first national new district in northwest China and the fifth national new district in China. It is clearly stated in the document that the construction of Lanzhou New District should be taken as an important measure to further implement the strategy of developing the western region, and Lanzhou should be developed into a modern metropolis in the northwest region in 2020.

On February 23rd, 20 16, Lanzhou was rated as the fifth among the top ten happiest provincial capital cities in 20 15 by CCTV.

Geographical environment:

Topography: Lanzhou is located in the northwest of China and the middle of Gansu Province. Its urban area is located at 36 03' north latitude and 65 438+003 40' east longitude. It borders Wuwei City and Baiyin City in the north, Dingxi City in the east and Linxia Hui Autonomous Prefecture in the south, with a total area of 13085.6 square kilometers.

Hydrology: Lanzhou is rich in inbound water resources. Through the Yellow River and its tributary Huangshui, the inflow of Datong River reached 33.7 billion cubic meters. The water quantity is stable, it is not frozen in all seasons, and the sediment concentration is small. The Lanzhou section of the Yellow River is 152 km, of which 45 km flows through the urban area.

Natural environment:

Water resources: Lanzhou's water resources are lower than the national average, and the Yellow River and its tributary Huangshui can meet the urban industrial and agricultural water and domestic water. Lanzhou has 960 million cubic meters of groundwater every year. The total surface water resources of river runoff is 38.4 billion cubic meters, and the total groundwater is 960 million cubic meters. In the upper reaches of the Yellow River, 25 large and medium-sized hydropower stations can be built with Lanzhou as the center, with a total installed capacity of150,000 kilowatts. Liujiaxia, Bapanxia, Yanguoxia and Daxia hydropower stations and other hydropower stations in the neighboring areas constitute one of the largest hydropower centers in China.

Mineral resources: As of 20 14, there are 35 kinds of mineral deposits and occurrences in Lanzhou 156. There are 35 kinds of minerals in 9 categories, including nonferrous metals, precious metals, rare earths and energy minerals. Baiyin and Jinchang near Lanzhou are important producing areas of nickel, lead, zinc, rare earth and platinum group precious metals in China. Non-metallic minerals are relatively rich, including limestone, flux dolomite, flux quartzite, ferrosilicon quartzite and refractory clay. Among them, quartzite reserves are concentrated, and the transportation reserves reach 300 million tons, which provides sufficient reserve resources for ferrosilicon industry. The coal reserves are 905 million tons.

Biological resources: As of 20 14, Lanzhou has woodland 182550 hectares, accounting for 13.46% of the total area, including 90 157 hectares of woodland and 770,000 hectares of natural grassland. The total number of wild plants is about 20, and the species with obvious economic utilization value account for 0.004% of the total. As of 20 14, the plants in Lanzhou include licorice, angelica, codonopsis pilosula, ephedra, Gentiana macrophylla, podophyllum, Daphne giraldii, rose and other Chinese herbal medicines. Wild animals 187 species, rare animals are: black stork, Tibetan snow chicken, leopard, blue horse chicken, etc.

Land resources: As of 20 14, the land area of Lanzhou City is 139953 hectares. Among them, there are 2 10009 hectares of cultivated land, 76,000 hectares of woodland and 765,000 hectares of grassland, and nearly 235,000 hectares of unused grassland, saline-alkali land and sandy land. Land resources can be divided into three types, namely: middle and low mountain pastoral areas, located in the west, southwest and south of Lanzhou; Valley Chuantai fruit and vegetable area, located in the valley terrace of each river; Grain and oil areas in low mountains and hills are distributed in northern mountainous areas of Yuzhong, northwest of Gaolan County and Qinwangchuan of Yongdeng County. The land types are complex and diverse, which is suitable for the development of agriculture, forestry, animal husbandry and by-fishing, and has great development potential.